JComboBox

I have written the following code

Code :

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package test;
 
import java.awt.BorderLayout;
 
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
public class ViewEditSelection extends JPanel{
 
	/**
	 * @param args
	 */
 
 
 
	public  ViewEditSelection(){
		super(new BorderLayout());
 
		String[] List = { "View", "Edit" };
		JComboBox ViewEdit = new JComboBox(List);
		ViewEdit.setSelectedIndex(0);
 
		add(ViewEdit, BorderLayout.PAGE_START);
 
	}
	 private static void createAndShowGUI() {
	        //Create and set up the window.
	        JFrame frame = new JFrame();
	        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
	        //Create and set up the content pane.
	        JComponent newContentPane = new  ViewEditSelection();
	        newContentPane.setOpaque(true); //content panes must be opaque
	        frame.setContentPane(newContentPane);
 
	        //Display the window.
	        frame.pack();
	        frame.setVisible(true);
	 }
 
	 public static void main(String[] args) {
 
		 javax.swing.SwingUtilities.invokeLater(new Runnable() {
	            public void run() {
	                createAndShowGUI();
	            }
		 });
	}
 
 
}

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as you see the output is like the first attached file but I want it to be like the second one.Actually I want to hide the upper part. is it possible to do so ? and if yes, how?

Code :

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JFrame frame = new JFrame();
frame.setUndecorated(true);

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